#40474F

#40474F

Color Values

HEX

#40474F

RGB

64, 71, 79

HSL

212.0, 10.5%, 28.0%

HSV

212.0, 19.0%, 31.0%

CMYK

19.0%, 10.1%, 0.0%, 69.0%

OKLCH

0.3946 0.0164 251.8

Properties

Cool Dark Nearest: RAL 7015 Slate Grey

Color Harmonies

Complementary

#40474F

#4F4840

Analogous

#404E4F

#40404F

#40474F

Triadic

#40474F

#4F4047

#474F40

Split Complementary

#40474F

#4F4040

#4E4F40

Tetradic

#40474F

#4F404E

#4F4840

#404F40

Color Blindness Simulation

Original

#40474F

Protanopia

#43434D

Deuteranopia

#43424D

Tritanopia

#404C4B

Achromatopsia

#464646

CSS Usage

background-color: #40474F;
color: #40474F;
border-color: #40474F;
Nearest Tailwind: Zinc 700 #3F3F46

Tailwind Shades

50
#F7F7F8
100
#ECEDEF
200
#D8DBDF
300
#BBC1C8
400
#97A0AB
500
#727F8D
600
#5B6571
700
#49515A
800
#393F46
900
#2C3035
950
#1C1E21

Contrast Checker

Text on white

9.41:1

AA Pass AAA Pass

Text on black

2.23:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026